Legend HS-808 Installation Manual

HS-808
HYDRAULIC SEPARATOR

Introduction

The HS-808 Hydraulic Separator is a multi-function device that provides hydraulic separation, air elimination
and dirt removal in a single, compact device that requires little maintenance. The HS-808 functions as a
"Bridge and a Disconnect" between a heating/cooling systems power generating unit(s) and the distribution
system. The flow pattern through the HS-808 depends on the flow rates of the primary and secondary sides
of the system. (See flow diagrams in the Size Section) The various mixing patterns internal to a hydraulic
separator create a blending of the primary and secondary flows and temperatures, thus creating a "Bridge"
between the two sides. Modern hydronic systems, especially those that contain low mass, water tube
boilers, like a Mod-Con, generally have a relatively high flow / high head pumping requirement to operate at
peak efficiency on the Primary side. In contrast, the Secondary, distribution side of the system, often has a
relatively low, even variable flow, with very little pumping head. The HS-808 Hydraulic Separator provides
a "Disconnect" between these very distinct requirements on the primary and secondary sides of the system,
so that they do not interfere with each other. Hence, the "Bridge and Disconnect" benefit of a hydraulic
separator.
Additional features of the HS-808 Hydraulic Separator include: Air & Debris Removal - The flows of both the
primary and secondary sides of the system go into the HS-808 where the fluid velocities slow down allowing
air to rise and be vented out through a serviceable automatic air vent, and dirt particles to fall out and collect
at the bottom, ready to be purged out through the Purge Valve with standard ¾" garden hose connection.
Boiler
Circulator
Advantages of the HS-808
- Provides hydraulic separation between the primary & secondary sides of the system.
- Allows for variable system flow and fixed or variable boiler flow, without pump interference between
the two sides.
- Includes a high capacity automatic air vent with service check for the removal of air from the system.
- Includes a drain valve with ¾" garden hose threads for the purging of collected dirt from the system.
- Available in up to 6 different connection types, in multiple sizes.
- Has a ½" plugged port where you could mount a thermometer and / or pressure gauge.
- Includes an aluminum embossed insulation shell and aluminum tape.
High
To & From Zones
E ciency
(e.g. Radiant Manifolds)
Boiler
Zone
Circulators
Hydraulic
Separator
Pictured:
w/Air Vent
Sample System
and Purge
300 N. Opdyke Rd.
Auburn Hills, MI 48326
www.legendhydronics.com
www.legendhydronics.com
1-866-752-2055
866-752-2055

Installation Guide

Pictured:
HS-808 with LegendConnect™
Adaptors